iPhone updates. New maps, software upgrade. The big star of last year's MacWorld gets a few tweaks here and there, including a new version of the Maps application, which can find your location via triangulation from Wi-Fi base stations or cellular towers, still no GPS. Favorite Web sites can now be iconized on the home page via the new Web Clips feature, and multiple SMS text messaging is now supported. Version 1.1.3 of the iPhone software is now available for free for all existing iPhone owners in the U.S., U.K., Germany and France.